Printing-machine



(No Mo.del-) J. H. ORANSTON.

PRINTING MACHINE.

Patented Sept. 26, 1882.

iv/ezzfpra- UNITED 4 STATES PATENT OFFICE.

JOHN H. GRANSTON, OF NORWICH, CONNECTICUT.

PRINTING-MACHINE.

SPECIFICATION forming part-of Letters Patent No. 265,029, dated September 26, 1882.

' Application filed May 8, 1882. (No model.)

To all whom it may concern Be it known that I, JOHN H. ORANSTON, a citizen of the United States, residing at N orwich, in the county of New Londonand State such as will enable others skilled in the art to which it appertains to make and use the same, reference being bad to the accompanyingdrawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

This invention relates to an improvement in printing-machines, the object being to provide a simple and effective means of stopping the revolutions of the impression-cylinder and setting the same back when required; and the invention consists in certain peculiarities in.

1 he construction and arrangements of parts, as will be hereinafter more fully described.

In the annexed drawings, which fully illustrate my invention, Figure 1 is a side elevation of a portion of a cylinder-press with my improvement attached. Fig. 2 is a transverse vertical section of the same. Figs. 3 and 4 are details.

'Like letters indicate like parts in the several views.

A represents the frame-work of an ordinary cylinder-press. B is a shalt journaled in a box, 1), formed on or attached to abar, c. On this shaft, outside-of the main frame, are two pulleys or driving-wheels, G 0, one fast and the other loose on theshaft. By shifting 'a belt which connects with a suitable motor from one pulley to the other the shaft B may be rotated or not at pleasure. A pinion, D, is also secured to the shaft B and meshed with a gear, E, which in turn meshes with a large gear-wheel, F, that rotates the impression-cylinder. The cylinder is notshowniu the drawlugs.

Securely attached to or cast with the pinion D is a hub or wheel, d, the periphery of which is provided with a shallow groove, in which fits loosely a friction clutch or band, f, that is pivoted at its two extremities, g and h, to a lever, G. It will be observed that the bandf does not extend entirely around the hub d, but is bent tangentially, forming one of its ends, 9,

The

ings, forconvenience of operation by the feeder 66 or pressman. (See Fig. 2.) This mechanism consists preferably of a shaft, J, connected by a lever, L, with the lower end of a vertical rod, M, which is provided with atreadle,

n, at its upper end. A short distance from the end h of the band fis pivoted, at one end, a rod, N, the other end of the rod passing through a box, 0, secured to the side of the press, as shown in Fig. 1. A'collar or stop, 1", is adjustably secured to the rod N, between which stop and the box 0, and coiled around the rod, is a spiral spring, S, or other yielding substance. 0n the end of the rod N isa screwnut, P, for adjustingthe tension of the bandf. The spring S, in connection with the rod N and the box 0, forms a yielding resistance or fulcrum to the lever G.

The operation of the device is as follows: When the shaft B and impression-cylinder are in motion, if it is desired to stop the cylinder, the driving-belt is first shifted to the loose pulley, and then the operator depresses the treadlen and rod M, (shown in drawin gs,) thereby causing the band or clutch f to bear with friction against the hub cl, causing a stoppage of the pinion D, the intermediate gear, E, and in consequence the impression-cylinder. In

case the cylinder has revolved somewhat more than is desired, so that'it becomes necessary to reverse its motion for the purpose of" giving it a proper setback or bringing it to the desired position for starting, the operator will further depress the rod M, causing the rod N to yield or slide through the box 0, thus revolving the band or clutch f, which tightly grips the hub 01, thereby causing the pinion D to reverse, and through the intermediate gear, E, turn the cylinder in the opposite direction to thatin which it usually rotates. The descent of the rod M compresses the springs attached thereto, and by releasing the treadle 1b the springs S and 19 throw the mechanism back to its original position. It is evident that a few depressions only of the treadle and rod M will be neces sary to bring the cylinder to any desired polever G for the purpose of stopping or revers sition. in g the cylinder, as specified. I 5

Having thus described my invention, what I 2. In a printing-press, the combination, with claim as new, and desire to secure by Letters the cylinder, gears F E and D, friction-clutch f, 5 Patent, isand yielding fulcrum N, of the levers G I, link 1. In aprinting-press, the combination, with H, shaft J, lever L, and spring-rod'M; having the impression-cylinder, gears F- E, shaft B, treadle a, substantially as described. and gear D, secured thereon and provided In testimony whereofIafifix my signaturein with a hub or wheel, at, having a grooved pepresence of two witnesses.

10 riphery, of a friction-clutch consisting of the J OH1\ H. ORANSTON.

band f, the lever G, attached to said clutch, Witnesses: the yielding fulcrum N, and means, substan- M. H. SIssoN,

tially as described, for imparting motion to the I LUCIUS BROWN. 

